The mother of missing Indiana University student Lauren Spierer posted another plea on the family's website Thursday asking for information leading to the whereabouts of her daughter.

Charlene Spierer writes that the family is waiting to hear if human remains found in the White River are those of her daughter. That could take up to eight weeks, which Spierer describes as "80,640 minutes of agony."

"It sickens me to write to you once again, but I have no choice. Time continues to pass and I cannot let you forget about Lauren," Spierer wrote, addressing the people whom she believes have knowledge about her daughter's disappearance.

Lauren Spierer went missing in June 2011 after a night out with friends in downtown Bloomington. Despite extensive searches, there has not been a break in the case.

Charlene Spierer says little things continue to remind her of her absent daughter, including walking past her room and receiving mail addressed to Lauren. She says there are still unpacked boxes that she "cannot bear to move."

Regarding the investigation, Spierer says that her daughter's DNA and dental records are on file with CODIS, an DNA database used by the FBI. But in the letter posted Thursday, she mainly spoke of the pain of losing her daughter and not knowing what happened to her.

"Somehow I doubt that you are a parent. I guarantee you have no idea what it's like, waiting to find out if the remains recovered from any number of places are those of your child. I hope I am making you uncomfortable. I hope you have as many sleepless nights as I have. I hope that some day, your parents, your siblings, your friends will all be in a courtroom when your true self is revealed, the self which was born on June 3, 2011 when you took Lauren from us," she writes.

Spierer also says her family was shocked when several of Lauren's friends hired attorneys within a few days of her disappearance. She was last seen on a Bloomington street after a night out with friends.

"Questions remain unanswered and law enforcement polygraphs remain untaken. We are still without Lauren," Spierer writes. "I will never forgive those who could have helped and did not."